Organic chemistry Lesson plan Class XII CBSE Topic "distitinguish aldehydes & Ketones, primary secondary and tertiary alcohols, alcohols & phenols

A.K.GUPTAA.K.GUPTAP.G.T.CHEMISTRYKENDRIYA VIDYALAYA BALLYGUNGEKOLKATA-700019WESTBENGAL,INDIA

1AKG/KVB/Distinguish

Learning Objectives:Learning Objectives:at the end of the lesson the pupil shall-at the end of the lesson the pupil shall-

• Know Know the structure of the compound from its the structure of the compound from its common/IUPAC namecommon/IUPAC name

• Tollens reagent, Fehling's solution, ferric chloride, Tollens reagent, Fehling's solution, ferric chloride, Iodoform test, Lucas reagent etc.Iodoform test, Lucas reagent etc.

• Understand-Understand-(I) reducing & non reducing property of (I) reducing & non reducing property of aldehyde & ketone based on the structure of the aldehyde & ketone based on the structure of the functional group.functional group.

• Difference in reactivity of 1Difference in reactivity of 1ºº,2,2ºº,3,3ºº alcohols towards alcohols towards nucleophilic reactions.nucleophilic reactions.

• Iodoform testIodoform test• Apply Apply the knowledge gained to distinguish various the knowledge gained to distinguish various

given compoundsgiven compounds• Develops Skill Develops Skill to perform experiment, draw conclusions to perform experiment, draw conclusions

predict ,the compound/functional group.predict ,the compound/functional group.2AKG/KVB/Distinguish

INSTRUCTIONAL AIDS USEDINSTRUCTIONAL AIDS USED• Power point presentation, computerPower point presentation, computer• Chalk & Black BoardChalk & Black Board• Chemicals, test tubes sprit lamps etc Chemicals, test tubes sprit lamps etc

for demonstrationfor demonstration• Work sheetsWork sheetsetcetc


Write the structure of the following Write the structure of the following compoundscompounds

Methanol Formaldehyde Benzophenone

Ethanol Acetaldehyde Pentan-2-one

Propan-1-ol Acetone Pentan-3-one

Propan-2-ol Benzaldehyde t-Butyl alcohol

Phenol Acetophenone Sec-Butyl alcohol

AKG/KVB/Distinguish 4

What is ?

1 Lucas Reagent ZnCl2 + Conc HCl

2 Tollens Reagent Ammoniacal solution of Silver nitrate .[Ag(NH3)2]OH

3 Fehling Solution-A Aq soln of CuSO4

4 Fehling Solution-B Alkaline soln of Rochelle salt(sod pot tartarate)

5 Iodoform Test


IODOFORM TEST


Compounds having O OH ║ │ R─C-CH3 Or R ─C –CH3

│ H Structure on reaction with mixture of NaOH & I2 give

yellow coloured ppt of iodoform (CHI3)


Tollens Test For Aldehydes


Test For Phenolic –OH Group

Sample of Phenol + Neutral FeCl3 soln Violet colouration


Test for 1º,2º,3º Alcohol


Test Observation3º Alcohol + Lucas Reagent

ZnCl2 + Conc HClTurbidity appears immediately

2º Alcohol -do- Turbidity appears after some time

1º Alcohol -do- Turbidity does not appear


TestTest ObservationObservation InferenceInferenceAcetaldehyde

Benzaldehyde

Write the test to distinguish between Acetaldehyde & Benzaldehyde


TestTest ObservationObservation InferenceInferencePropanone

Propan-2-ol

Write the test to distinguish between Propanone & Propan-2-ol


TestTest ObservationObservation InferenceInferenceMethanol

Ethanol

Write the test to distinguish between Ethanol & Methanol


TestTest ObservationObservation InferenceInferenceAcetophenone

Benzophenone

Write the test to distinguish between Acetophenone & Benzophenone


TestTest ObservationObservation InferenceInferenceEthanal

Propanal

Write the test to distinguish between Ethanal & Propanal


TestTest ObservationObservation InferenceInferenceBenzaldehyde

Acetophenone

Write the test to distinguish between Benzaldehyde & Acetophenone


TestTest ObservationObservation InferenceInferencePropanone

Propanal

Write the test to distinguish between Propanone & Propanal


TestTest ObservationObservation InferenceInferencePenta-2-one

Pentan-3-one

Write the test to distinguish between Penta-2-one & Pentan-3-one


TestTest ObservationObservation InferenceInference1-Propanol

2-Propanol

Write the test to distinguish between 1-Propanol & 2-Propanol

REFERNCEREFERNCE• Learning to teach –by Linda Shalaway

(scholastic professional books )• Starko, A.J. Creativity in the Classroom.

White Plains, N.Y;Publishers,1995• Modern’s ABC of Chemistry – Dr.S.P.Jauhar;

Modern Publication.• http://www.classroom.net• http://gsn.org• http://scholastic.com/Instructor


http://www.classroom.net/

http://gsn.org/

http://scholastic.com/Instructor

Education

Organic chemistry Lesson plan Class XII CBSE Topic "distitinguish aldehydes & Ketones, primary secondary and tertiary alcohols, alcohols & phenols